/Engine/Plugins/Media/ElectraCodecs/Source/ElectraDecoders/Public/IElectraDecoderOutputVideo.h
Returns the number of decoded horizontal pixels. This value may be different fromGetWidth()since it does not take any cropping values into account. Note that this represents the actual dimension of the data returned, which may differ fromGetWidth()+ cropping offsets! (e.g. if the data is returned as RGBA pixels, but represents a YUYV 4:2:2 format)
int32 GetDecodedWidth() const